I just received this car and from what I know it numbers matching in bad shape as it has been sitting for a number of years in my dads back yard,
My real issue is what is worth doing to this car, keepin it original or just make the custom ride happen, if I go the custom way how do I get parts for the 455 engine and what parts are interchangeable. for instance I know that the regals montes, and grand prix of the 80's share many parts, is there a car that could be a donor thats not a riv.
thanks for any help, this is new to me, the car is older than me and I have not much experience in this group.

THE 455 WAS USED IN 67-76 BUICK . THETRANS IN 65-66 LASABER ,67-76 BUICK AND 69-70 RIVERIA ,IT IS A TH400 SO PARTS ARE EASY TO GET. A CHECK AT SUMMIT RACING AND JEGS WEB SITES SHOULD SHOW WHAT SPEED EQUIPMENT IS AVAILABLE . WOULD GET QUOTES ON WHAT YOU WANT DONE TO BODY AND INTERIOR BEFORE MAKING A BIG JUMP, YOU COULD HAVE STICKER SHOCK,LIKE I DID THE OTHER DAY WHEN I WAS QUOTED $180.00 FOR A QUART OF PAINT TO FINISH MY TOY.